16
3.7
QSK T/R Relay PCB Installation
Synopsis
The stock amplifier’s bias relay, T/R relay, and coaxial cables will be removed and discarded.
The QSK T/R Relay PCB (with vacuum relay) will then be installed, completing the quiet
QSK upgrade.
Bias Relay Removal
The bias relay is located between the “RF Input” and “RF Output” SO-239 connectors as
shown in Figure 3.11.
Figure 3.11: Bias Relay Prior to Removal
•
Cut the plastic wire ties (or string-ties in older TL-922 amplifiers) holding the (grey)
coaxial cables to the wiring harness.
•
Do NOT remove the cathode drive (black coaxial cable).
•
Cut and remove the stock grey coaxial cables near the SO-239 connectors.
•
Remove all remnants of the grey coaxial cables and remove the solder from the SO-239
center pins, etc.
NOTE:
Do not remove the 68KΩ resistor lead from the “RF Output” SO-239
connector.
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Summary of Contents for TL-922 Revival (tm)
Page 13: ...6 Figure 3 1 TL 922 Revival tm Upgrade Kit Contents www KesslerEngineeringLLC com...
Page 18: ...11 Figure 3 4 LED Circuit Board Correctly Installed www KesslerEngineeringLLC com...
Page 30: ...23 Figure 3 19 QSK PCB to QRO Output Connections www KesslerEngineeringLLC com...
Page 34: ...27 Figure 3 23 Electronic Bias PCB Installed www KesslerEngineeringLLC com...
Page 47: ...40 Figure 3 30 Step Start PCB www KesslerEngineeringLLC com...
Page 49: ...42 Figure 3 33 LED Schematic Diagram Figure 3 34 LED PCB www KesslerEngineeringLLC com...
Page 50: ...43 Figure 3 35 Electronic Bias Schematic Diagram www KesslerEngineeringLLC com...
Page 51: ...44 Figure 3 36 Electronic Bias PCB www KesslerEngineeringLLC com...
Page 54: ...47 User Notes www KesslerEngineeringLLC com...
Page 55: ...48 5 1 User Notes Continued www KesslerEngineeringLLC com...
Page 56: ...49 5 2 User Notes Continued www KesslerEngineeringLLC com...
Page 57: ...50 5 3 User Notes Continued www KesslerEngineeringLLC com...
